Question

Question 18 (1 point)
Mechanical advantage is calculated by using the formula:

a
Height of Slope (H) / Length of Slope (L)
b
Normal Force/ Acceleration
c
Force of Friction/Gravity
d
Length of Slope (L) / Height of slope (H)
Question 19 (2 points)
Match the following terms to their correct answer.

Column A
1.
1 Joule:
1 Joule
2.
Work formula:
Work formula
3.
Pulley:
Pulley
4.
Inclined Plane:
Inclined Plane
Column B
a.Zipline
b.W= FD
c.1 N x m
d.Skateboard Ramp
Question 20 (1 point)
A student used a claw hammer to remove nails from a piece of wood to prepare to paint. Using the formula for mechanical advantage, what is the effort distance for a claw hammer if the resistance distance is 6.0 cm and the mechanical advantage is 6.0?



a
1
b
36
c
30
d
12
Question 21 (1 point)
A construction crew must use a lever to lift a boulder. The mechanical advantage of the lever is 6 and the lever applies a force of 1600 N to the rock. What is the force that the construction crew must apply to the lever?

a
134 J
b
380 J
c
534 J
d
267 J
Question 22 (1 point)
The inclined plane shown below is being used to lift a box 6.0 feet.



The inclined plane has a mechanical advantage of 1.5. What is the length, x, of the inclined plane?

mechanical advantage = (length of ramp)/(height of ramp)

a
2.5 feet
b
0.25 feet
c
7.5 feet
d
9.0 feet
Question 23 (1 point)
What is mechanical advantage?

a
The number of times the machine adds the effort force
b
The number of times the machine divides the effort force
c
The number of times the machine multiples the effort force
d
None of the above
Question 24 (1 point)
A mover load a box into the back of a moving truck by pushing it up a ramp. The ramp is 4.0 m long and the back of the truck is 1.5 m high. What is the mechanical advantage of the ramp?

Mechanical Advantage = length of the ramp/height of the ramp

a
0.4
b
5.5
c
2.7
d
6
Question 25 (1 point)
If a machine requires an input of 6000 J of work to put out 5000 J of work, what is the machine's efficiency?



a
100%
b
120%
c
40%
d
83%

Answer 1

Here are the answers to your questions based on the principles of physics and mechanical advantage:

**Question 18:**
Mechanical advantage is calculated using the formula:
**d. Length of Slope (L) / Height of slope (H)**

**Question 19:**
Match the following terms to their correct answer.
1 Joule: **c. 1 N x m**
Work formula: **b. W = FD**
Pulley: **a. Zipline**
Inclined Plane: **d. Skateboard Ramp**

**Question 20:**
Using the formula for mechanical advantage:
MA = Resistance Distance / Effort Distance
6.0 = 6.0 cm / Effort Distance
Effort Distance = 6.0 cm / 6.0 = 1 cm
**a. 1**

**Question 21:**
Using the formula for mechanical advantage (MA = Resistance Force / Effort Force):
MA = 6, Resistance Force = 1600 N
Effort Force = Resistance Force / MA = 1600 N / 6 = 267 N
**d. 267 J** (assuming the options were meant to represent force, otherwise the unit J for work or energy should be corrected to N)

**Question 22:**
Using the formula for mechanical advantage:
MA = Length of Ramp / Height of Ramp
1.5 = x / 6.0
x = 6.0 * 1.5 = 9.0 feet
**d. 9.0 feet**

**Question 23:**
What is mechanical advantage?
**a. The number of times the machine adds the effort force** (though this option could also be interpreted depending on context; traditionally, it can refer to the force magnification, but the wording here may imply the gain)

**Question 24:**
Using the formula for mechanical advantage:
MA = Length of Ramp / Height of Ramp
MA = 4.0 m / 1.5 m = 2.67 (approximately 2.7)
**c. 2.7**

**Question 25:**
Efficiency = (Output Work / Input Work) * 100%
Efficiency = (5000 J / 6000 J) * 100% = 83.33%
**d. 83%**

Let me know if you have further questions or need clarification on any topics!